Extension-chandelier



(NModel.)

H. HORN.

EXTENSION GHANDBLIER.

No. 420,270.` Paten-ted Jan. 28, 1890.A

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y UNITED STATES PATENT OFFICE.

HERMAN HORN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE HORN, BRANNEN & FORSYTHE MANUFACTURING COMPANY, OF

PENNSYLVANIA.

EXTENS|ONCHANDELlER.

SPECIFICATION forming part of Letters `Patent No. 420,270, dated January 28, 1890.

Application filed February 13, 1889. Serial No. 299,747. (No model.)

State of Pennsylvania, have invented certain new and useful Improvements in Extension- Ohandeliers; and I do hereby declare that the following is a full, clear, and exact description of the invention, reference being had to the accompanying drawings.

My invention has relation to extensionchandeliers of the class shown and described in Letters Patent of the United States No. 140,459, granted to .I ames Brannen onJuly l, 1873, and has for its object to improve the construction and increase the efficiency of the same.

My invention consists in certain details of construction and in the combination of parts, as hereinafter fully described and claimed.

In the drawings, Figure l ,is an elevation of my improvement applied to a chandelier, portions of the latter being broken away. Fig. 2 is a vertical longitudinal section of the same. Fig. 3 is an enlarged plan of outer shell and inner casing, with their covers removed so as to show the inner collar, pawl, and rack, and a cross -section of the twisted pipe. Fig-i is a vertical central section of my improvement complete.

A represents the `main gas-pipe provided with the distributer Ct, having arms a',

through which pipe and distributer gas passes into the short branch pipe A', from whence it iinds its way into an inner pipe and then into the extension-pipe B, after the manner shown in the above-mentioned patent.

C is the shell or casing containing the clutch mechanism, and is cylindrical in form and provided with screw-caps c, having a central internally-threaded opening c', which screws onto the threaded iiange a2 on branch pipe A. Thus it is suspended on the latter.

The lower end of this casing diminishes in size, as shown at c2, and is also provided with the central threaded opening c3, for reception of the adjusting device or stuffing-box c4. The inside of this stufng-box is smooth, as is also the inside of flange a?, allowing clearance-space for the passage of extension-pipe B, which latter sustains the usual harp or drop-light iixture, the arms of which are shown broken awayat b. The cap c, which is screwed into the top of casing C, is of considerable depth and is formed with a notch d in its under side for the reception of the outer end of the short spiral spring D, soldered to the 'upper surface of friction-plate d.v This friction-plate encircles the rim or iiange e of the cover e of rack-casing E, said cover being secured on pins e2 in the edge of said casing. Interposed between said plate and cover vis a washer cl2, of leather, felt, or other material, forming a jamb between the two metallic surfaces, as do the similar washers d3 d4 between the friction-plates d5 d6 and the bottom of casing E. Said plates and washers are provided with central open- Therefore, while there is considerable friction exerted on said casing, the smooth surfaces of the washers will permit the metallic surfaces to rotate regularly thereon. In the event of its being necessary to produce more friction therein or to'take up wearof the parts, the stuffing-box, which bears against the plate d6, is screwed inwardly against the yielding, pressure exerted by the spring-plate d until the necessary friction is attained; or, on the contrary, if the friction is too great the same can be lessened by reversing the operation.

Journaled in grooves f in the edges of the cent-ral openings f in top and bottom plates e' e3 of casing E is a small collar or ring F, having a central opening f5, substantially square therein, for the reception of the twisted extension pipe B, which is square in crosssecticn. This ring is provided with a fiat curved spring f2, secured in a slit or kerf f3 in the outer circumference of the same, serving the purpose of a pawl and engaging with teeth f4 on the inner circumference of casing C, so that when the twisted pipe with its attached fixture is drawn downwardly the spiral thereof, formed by the twisting of a square pipe, will rotate the casing E through the medium of the spring-pawl f2 engaging with the teeth f1. On the other hand, if said pipe be pushed upwardly the small ring F will be rotated in the opposite direction independently of the casing E, spring-pawl f2 merely riding over the teeth f4. Therefore the only power or force necessary in pushing the droplight fixture upwardly to its normal position is an amount only sufficient to overcome the weight of said fixture, and the extensionpipe, the pawl, and teeth offering no resistance to such operation, while when drawing the same downwardly the friction exerted on the casing E by the friction-plates and washers is sufficient to preclude the possibility of said fixture dropping accidentally; yet the washers, being of slightly-yielding material and presenting a smooth surface to the friotion-plates, will permit of the easy rotation of said casing when power is applied to the sliding tube. At the same time, owing, to their yielding nature, said Washers will permit of the slight embedding of the metallic Aplates in the surface thereof, thus preventing the accidental movement above suggested. v The extent of withdrawal of the extensionpipe is limited by contact of the head b with the shoulder a3 on the inside of flange a2.

I am aware that twisted pipes have been heretofore employed in extension chandeliers; but I do not wish to be understood as claiming ,such use broadly.

What I claim as my invention is as follows:

l. In an extension-chandelier, the combination,with,the extension-pipe and clutch-casing thereof, of the series of Valternating metallicfriction-plates d5 d6 and felt washers dm3 d4 on e both sides of said casin g and within a suitable shell, said series having at one end an adj-usting device and at the other end a spring resistance-plate, substantially as shown and described. l

2. In an extension-chandelier, the combina- 1 tion, with the extension-pipe thereof, of clutch therefor consisting of the casing E, f within a suitable shell and having on the in ner surface of its periphery the teeth f4, and having j ournaled therein the centrally-located g ring F, with a central opening therein for the passage of said extension-pipe and its pawl f2 lin engagement with said teeth, said casing being limited in its rotation by the pressure of suitable friction devices on both of its ends, substantially as shown and described.

8. In an extension-chandelier, the combina` tion, with the pipe B and the clutch-casing E, of the friction-plate d', provided with the spiral spring engaging with the notch d in the cap c of the shell C, and the washer d2, encircling the rim e of said casing and pressing thereon, the friction-plates dd, with openings for the passage of said pipe, and the washers d3 d4, with similar openings, and the stuffing-box c4, threaded into the shell C, substantially as and for the purpose described.

4. In an extension-chandelier, the combination, with the twisted extension-pipe B and the shell C, containing the friction-plates and washers and sustaining the stuffing-box, of the ring F, having the spring-pawl f2, secured in the slit f3, and engaging with the ratchetteeth f4 in the casing E, said ring being journaled in grooves f inthe edges of the openings f in top and bottom plates e e3 of said casing, and having the square opening f5 for engagement with the square or flat surfaces of the twisted pipe, substantially as `and for the purpose set forth.

5. In an extension-chandelier, the combination, with the pipe B, of the shell C, secured to pipe A and containing the clutch-casing E, having the cover e on pins e2, with the flangey e., said cover Vand bottom plate e3 having central openings f ring F, with square opening f5, and the pawl f2 inthe slit f3, engaging with the teeth f4 and journaled in Vthe grooves fin said casing, friotioneplate d', With its spring D, engaging with the notch clin the cap c, said plate and the stuffing-box 'c4 in the opening c3 in the portion c2 having inter- 1 posed between them and the said casing the washers cl2 d3 d4 and the plates d5 de, as and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 7 th day of February, A. D. 1889.

y HERMAN HORN.

Witnesses:

WM. H. POWELL, R. DALE SPARHAWK. 

